Flora of North America species comparison

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Draba asprella var. asprella

Draba asprella var. stelligera
Photo is of parent taxon

rough Draba
Photo is of parent taxon

rough Draba
Fruit

valves hirsute, trichomes simple and unequally 2-rayed, (0.2–)0.3–1 mm.

valves puberulent, trichomes 2–4-rayed, 0.1–0.2 mm.
2n

= 30.

Draba asprella var. asprella

Draba asprella var. stelligera
Phenology Flowering Mar–May. Flowering Apr–Jul.
Habitat Rocky igneous soil in pine-oak woodlands On and around limestone and sandstone rock outcrops in pine-oak and pinyon-juniper communities
Elevation 1500-2500 m (4900-8200 ft) 1500-2400 m (4900-7900 ft)
Distribution
from FNA
AZ
[BONAP county map]
from FNA
AZ
[BONAP county map]
Discussion

Variety asprella is known only from Coconino and Yavapai counties in central Arizona.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Of conservation concern.

Variety stelligera is known from Coconino, Gila, and Yavapai counties in northern and central Arizona. The difference between vars. kaibabensis and stelligera rests on trichome density and the proportion of simple versus branched hairs on the leaves. These features are highly variable and we find no dependable characteristics separating populations on the North Rim of the Grand Canyon from those to the south.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 7, p. 293. FNA vol. 7, p. 293.
Parent taxa Brassicaceae > tribe Arabideae > Draba > Draba asprella Brassicaceae > tribe Arabideae > Draba > Draba asprella
Sibling taxa
D. asprella var. stelligera
D. asprella var. asprella
Synonyms D. asprella var. kaibabensis
Name authority unknown O. E. Schulz: in H. G. A. Engler, Pflanzenr. 89[IV,105]: 106. (1927)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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